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Choose the correct alternative: (a) Al...

Choose the correct alternative:
(a) Alloys of metals usually have (greater/less) resistivity than that of their constituent metals.
(b) Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals.
(c ) The resisitivity of the alloy manganin is nearly independent of/increases rapidly with increase of temperature.
(d) The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of `(10 ^(22) //10 ^(23)).`

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independent of temperature
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Choose the correct alternative : The resistivity of a typical insulator (eg, amber) is greater than that of a metal by a factor of the order of (10^(22) //10^(23)) .

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Knowledge Check

  • Which metal exists as liquid at room temperature ?

    A
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    B
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    C
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    D
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